| | Jupiter Island, FL | Hutchinson Island South, FL | United States |
| Population | 879 | 4,535 | 329,725,481 |
| Female Population | 50.2% | 49.7% | 50.5% |
| Male Population | 49.8% | 50.3% | 49.5% |
| Median Age | 60.2 | 71.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 817 | 5,428 | 309,327,143 |
| Population - 2000 | 620 | 4,846 | 285,036,114 |
| Population - 1990 | 549 | 3,893 | 251,960,433 |
| Pop. 2000 to Now | 51.8% | 18.2% | 15.6% |
| Pop. 1990 to Now | 71.4% | 47.2% | 30.8% |
| space4 | | | |
| Population Density | 324.4 | 1,053.2 | 93.4 |
| Land Area | 2.7 | 4.3 | 3,531,905.4 |
| Water Area | 0.9 | 43.8 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Jupiter Island, FL | Hutchinson Island South, FL | United States |
| Age 0 to 4 | 0.5% | 0.0% | 5.9% |
| Age 5 to 9 | 2.0% | 0.7% | 6.1% |
| Age 10 to 14 | 3.2% | 0.2% | 6.6% |
| Age 15 to 17 | 1.7% | 0.5% | 3.9% |
| Age 18 to 20 | 3.9% | 0.5% | 4.0% |
| Age 21 to 24 | 3.4% | 1.1% | 5.2% |
| Age 25 to 34 | 8.5% | 2.0% | 13.8% |
| Age 35 to 44 | 10.9% | 3.1% | 12.9% |
| Age 45 to 54 | 8.0% | 5.0% | 12.6% |
| Age 55 to 59 | 7.2% | 7.0% | 6.7% |
| Age 60 to 64 | 8.5% | 9.6% | 6.3% |
| Age 65 to 74 | 16.5% | 34.3% | 9.6% |
| Age 75 to 84 | 21.2% | 25.2% | 4.5% |
| Age 85 and over | 4.6% | 10.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Jupiter Island, FL | Hutchinson Island South, FL | United States |
| White | 80.1% | 93.2% | 59.4% |
| Black | 13.4% | 0.0% | 12.2% |
| Asian | 2.3% | 0.2% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.3% | 2.7% | 3.2% |
| Hispanic | 3.9% | 3.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Jupiter Island, FL | Hutchinson Island South, FL | United States |
| Married Population | 58.1% | 64.0% | 49.8% |
| Currently Married | 58.1% | 63.8% | 48.0% |
| Married but Separated | 0.0% | 0.2% | 1.8% |
| Single Population | 41.9% | 36.0% | 50.2% |
| Never Married | 29.2% | 8.2% | 33.8% |
| Divorced | 2.9% | 9.3% | 10.8% |
| Widowed | 9.8% | 18.5% | 5.6% |
| space5 | | | |
| Household Size | 1.90 | 1.69 | 2.60 |
| Households | 350 | 2,678 | 124,010,992 |
| Family Households | 216 | 1,510 | 80,755,759 |
| Married couple, w/children | 10.6% | 0.9% | 30.5% |
| Married couple, no children | 86.6% | 90.9% | 42.9% |
| Non Family Households | 134 | 1,168 | 43,255,233 |
| Single householder, w/children | 2.8% | 3.1% | 15.8% |
| Single householder, no children | 0.0% | 5.0% | 10.8% |